Sound reproducer



E. KUHN.

SOUND REPRODUCER.

APPLlcATIoN FILED MAY18.f92|.

Patented Apr. 11, 1922.

2 SHEETS-SHEET lnventoz E. KUHN.

SOUND REPRODUCER.

V APPLICTION FILED MAY18|192L 1,4.12,560. Patented Apr. 11, 1922.

2 SHEETS-SHEET 2.

/4, 27 H11 l- -WIIII I* Il /f/ l] f6 E jy/fjm i fz fg 2/ f5 Z5 unirse STATES PATENT OFFICE.

EDMONB ETTEN, OF R-OOKLYN. NEVI YORK. ASSIGNOR T REMINGTON PHONOGRAPH COB'PORMhTON, QF XTILMDUGTON= BELAWRE, A CORPORATION OF DELAWARE.

kSOUNB REPROD'UCER.

iai

lApplication filed May 18,

20 ranged that fthe volume of sounl passing iron.-`t.he reproducer to the' tone erin' n f1' 'sed ,r diminished at-Will.- f-

lird ii'nportant lobj vet or" the invention to provide.y in surh a device, meailis to tull if'olnme oi sound with each harige oiitheneei'le unless such volume is iviltnllv reduced. I

"Vitli the above and other objects in view, the invention Consists in general oi certain novel details of construction and combinations oi parts hereinafter fully described, illustrated in the accompanying? drawings, and spez-iiicaily claimed.

Tn the accompanying drawings. like Characters of reference indicate like parts in the several vieivs, and i Figure 1 is a side elevation oi a port-ion i a 1)honograph showing` the improved arangeinent oi: the tone arm and reproducer, 40 the latter beine shown on a disk record.

Figure 2 is an enlarged detail showing the reproducer raised in needle changing position.

Figure 3 is an enlarged detail j .artly in section on the line TIT-TTT ot Figure 2.

`Figure fl-is a section on the line TV-TV ot Figure 3.

Figure 5 is a rdetail side view of the reproducer removed from the tone arm.

Figure 6 shoivs grouped details villustrating` in side and end elevation the sound volume regulating valve.

Tn the embodiment of the invention herein illustrated there is employed a tone arm 10 which is mounted at 11 to .swing horizon- Specification of Letters .Patent.V Patented Apr, 11 1922,

1921. Serial No. 4701698.

mally registers With the opening. 13. Vith- Y in this journal is mounted a sleeve valve 16:

having a port 17 in one sidethereof. This valve is closed at one end and the closed end is provided with an .axial stem 18 which projects through a closure plate 19 screwed into an annular iiange 20surrounding. the end of the journal opening 12,` On the'end of this stem is fixed a pointer orV indicatorv 21y'vhichtraverses a series ot graduations 22 'formed around the edge of the closure 19. The rear end 23 oi this pointer isy extended and bent down beyond the periphery lof Vthe closure so that it maycon'tact, under suitable conditions With a stop member 24 projecting from said closure.

For the purpose of holding the'sleeve valve in position Within the tubular journal 15 a pin 25 projects inwardly from the valve and einen`r f in an arrnaie sic-' exteiulinf.; partially around the journal. This also prevents too great rotary movement of these parts relative to each other and it is to be noted that the pin is at one end of the slot when the openings 15 and 17 are exactly in registry.

Since the tone arm has no vertical move ment `provision is made to ensure proper Contact ot the needle with the record R. To that end one side of the reproducer is provided ivith a Weight 27 as shown, this Weight also serving as a handle for manipulating the reproducer and tone arm.

From an inspection of Figures 1 and i it Will be plain that shifting the position of the pointer on the graduated arc Will effect variation in the position of the valve and consequently in the effective area of the passage between the reproducer and to-ne arm. hloreover, it the reproducer be turned up towards the position shown in Figure 2, to change needles the pointer end 23 will first move around and engage the stop 24, since roo the valve Will turn through friction with the journal 15. Continuation of the movement of the reproducer will move the journal independently of the valve till the valve and journal ports are brou ht into full registry, further movement being 'prevented bythe action of the pin and slot 26. Thus, when the reproducer is turned down again to place the needle on the record the communica-ting passage will be fully opened. v

There has thus been provided a simple and eficientdevice of the kind described and for the purpose specified.

It is obvious that minor changes may be made in the form and construction of the invention without departing from the ma.- terial principles thereof. It is not therefore desired to confine the invention to the exact form herein shown and described, but it is wished to include all such as properly come Within the scope claimed.

vl .VI-Iavingthus described the invention, what is lclaimed as new,'is:'- t i .Y l. In a phonograph, a tone arm, la 4re producer carried by the tone arm, a volume regulating valve between the reproducer and tone arm, means exterior of the tone arm for regulating and indicating the position .of the valve with reference to the reproducer, and other "means associated with the last mentioned `means and arranged to move the valvey to fully opened position upon movement of the reproducer to needle changing position.

2. In a phonograph, a tone arm mounted forhorizontal swinging movement and restrained from vertical swinging movement, a reproducer mounted at the end of the tone arm for rotation about a horizontal axis, said reproducer having a hollovsT journal having port communication with the tone arm, a valve in said journal controlling the port communication, means exterior of the tone arm for regulating and indicating the position of the valve with reference to the reproducer journal port, and other means associated with the Vlast mentioned means and arranged to move the valve to fully opened position uponmovement ofthe reproducer to needle changing position.

3. In a phonograph, a tone arm mounted forhorizontal swinging movement and restrained from vertical movement, a journal bearing at the free end of the tone arm and having a port communicating with the tone arm, a reproducer, a hollow journal leading fromA said Vreproduoer and provided with a port normally registering with the bearingY port, a `sleeve valve rotatable within the journal and having a port movable intov and out of registry with the journal port, means exteriorl of the Vtone armV for moving the,V Y

valve, and other means associated with the last mentioned means and arranged to move theY valve to fully opened position upon movement of the reproducer `to needle changing position.

In testimony whereofl I hereuntoaiiix my signature.

Y EDMOND KUHN. 

